Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d91e22c187918f…

MALICIOUS

PDF

103.0 KB Created: 2021-07-02 02:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d2db27bac4f80a834c71b308ab25ec08 SHA-1: 722a140886140cbd14e0820105ab2a8cfe00a8d4 SHA-256: 06d91e22c187918f234167a8adf4d63049274737aa4d9da7a2eca0921d63b3b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crewmak.ru/uplcv?utm_term=face+to+face+appearances+from+jesus+pdf PDF link annotation
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42f481f4b4---85681321179.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/gibonesikuzapamole.pdfIn PDF document text
    • http://cfacgroupe.com/uploads/FCK_files/file/90517077774.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/ace3e30d6afaba797a0ab71ae2eddd9d/vuxozeladasuxexelijaliwir.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/21711274718.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160916e1ae40c1---23203578461.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a913f2dc8f721ae086753d4e50491c9b/damorosipu.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/e345b400c2fe7d82915fa411dcb0b336/xunuzigi.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/4440490702.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/bad433dfbb7436bec333e61d7b9d3424/92071663619.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/ed7fad06ba1c8d7b5e778d5687dcacc4/75298368304.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/d24a2f6275cd24e3690eb19336cbba60/wipiretekifokamoniginesu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a321d71ee44---66421512207.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3b35750b8cdb0c7d937fe9ffaf63a53b/43652758961.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/96624817430.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/lelusukutopiwona.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/rakogis.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/21505019189.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/91962015745.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/fanujulimiw.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/83cbgb8j4saa18lpcqu6id7eg6/xuneko.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/jiguzabuje.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/0770fda9043fa82ef9bc3fe394cf7396/davejosikenamatumolisutu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D36 10848 bytes
SHA-256: e6e01d708458c728f53379c04d7a6aa4eb02f01b51064f5d7fbc6b8e1d5b08ac
font_01_sfnt_off0001464d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1464D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E5F 18580 bytes
SHA-256: f58fe96a5514790c36d5e7ff17fceab1396f27020d3c2b2137ff9d2b57ef8ea2

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